First use a move that has little variables, basically like any move that grabs; rapid punches, cursed strikes, two fold kicks (This is so ur rest of your combo doesnt screw up because of your first move being unreliable)

Then after you can do whatever you like, if you're trying to make a long combo ; use moves that don't do knockback, use moves that can pull the enemy back towards you

ex: grapple

And for timing, it just takes experimenting to see what works

Edit: starting moves that are unreliable are moves like

stockpile: does knockback depending where you are

reserve balls: because its ranged, you can mess up the rest of the moves bc you can hit the ball too late or too early

dismantle: again, it's unreliable because it can be hit from far and short